Previous in Forum: Projector Flickering   Next in Forum: CPU Problem
Close
Close
Close
15 comments
Rating: Comments: Nested
Active Contributor
India - Member - New Member

Join Date: Aug 2010
Location: new delhi India
Posts: 19

UPS Problem

02/17/2011 4:16 AM

Hi everybody,

I have a tabletop PC with UPS. After every powercut the system is shutdown and restart at the next moment automatically. I checked all the connections are o.k. but i can't identify the problem. Can anybody please help me to shortout the problem?

__________________
sreedhar.r
Register to Reply
Interested in this topic? By joining CR4 you can "subscribe" to
this discussion and receive notification when new comments are added.

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#1

Re: UPS proplem

02/17/2011 5:13 AM

Er, and the problem is what, exactly?

__________________
"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Active Contributor
India - Member - New Member

Join Date: Aug 2010
Location: new delhi India
Posts: 19
#2
In reply to #1

Re: UPS proplem

02/17/2011 5:28 AM

Can't get me?.o.k.

I think UPS-Uninterrupted Power

whenever the power is not available the system should need to take the power from UPS directly without any interruption na?

Mine also doing this well But the proplem is it shutdowns a few seconds and then switch ON automatically

within that time all unsaved program have gone

__________________
sreedhar.r
Register to Reply
Guru
United Kingdom - Member - Indeterminate Engineering Fields - Control Engineering - New Member

Join Date: Jan 2007
Location: In the bothy, 7 chains down the line from Dodman's Lane level crossing, in the nation formerly known as Great Britain. Kettle's on.
Posts: 32175
Good Answers: 839
#3
In reply to #2

Re: UPS proplem

02/17/2011 5:40 AM

OK. "20 Questions" time.

  • So what does it say about it in the UPS Manual?
  • What does the UPS vendor have to say?
  • Is it still under warranty?
  • How valuable is the unsaved program and is there a maintenance call-out contract in force with the original equipment manufacturer or a local UPS distributor/aftermarket supplier?
  • Are the UPS batteries in top condition? If not, why not?
  • Is it switched into the correct operating mode?
  • What make and model is it?
  • How old is it?
  • Does the problem go away when an alternative UPS is substituted?
  • etc., etc.

None of these things can be seen from here.

__________________
"Did you get my e-mail?" - "The biggest problem in communication is the illusion that it has taken place" - George Bernard Shaw, 1856
Register to Reply
Guru
Hobbies - Fishing - New Member

Join Date: Jun 2008
Location: Raleigh, NC USA
Posts: 13529
Good Answers: 468
#4

Re: UPS proplem

02/17/2011 6:19 AM

Does your UPS also provide AVR (automatic voltage regulation)?

It sounds like your power goes out often. You may also have voltage spikes and drops that can wreak havok on your computer.......and maybe the UPS itself.

Just a thought, I don't know if this is the problem.

__________________
Those who would give up essential Liberty, to purchase a little temporary Safety, deserve neither Liberty nor Safety. Ben Franklin
Register to Reply
4
Guru
India - Member - New Member

Join Date: Sep 2009
Location: Temporarily at Ashburn, VA
Posts: 2744
Good Answers: 164
#5

Re: UPS proplem

02/17/2011 7:41 AM

i had a similar situation. My home has a normal inverter that is quite common due to frequent power outages. My desktop computer's small UPS was also on this inverter's output circuit. Whenever power went off, my PC would re-boot. After getting annoyed and arguing with APC (supplier of the PC's UPS) engineers, i thought maybe it is not a good idea to have two inverters in series. So, i ran a separate line from the mains to the PC's UPS, and voila ! everything worked fine thereafter.

Can't say whether your problem is the same...just a thought.

__________________
Nothing worthwhile can ever be taught, it can only be learnt.
Register to Reply Good Answer (Score 4)
Active Contributor
India - Member - New Member

Join Date: Aug 2010
Location: new delhi India
Posts: 19
#7
In reply to #5

Re: UPS proplem

02/18/2011 1:48 AM

Thank god,

Thank you verymuch for you sir.I am also having the same setup like you.

Previously i had connected my systems UPS with the inverter supply.

I had given a seperate mainline for my PC's UPS. I feel now the proplem has solved.

Thankyou once again

__________________
sreedhar.r
Register to Reply
Guru
India - Member - New Member

Join Date: Sep 2009
Location: Temporarily at Ashburn, VA
Posts: 2744
Good Answers: 164
#9
In reply to #7

Re: UPS proplem

02/18/2011 2:22 AM

Glad to have been of help. Hope you won't have this problem in future.

__________________
Nothing worthwhile can ever be taught, it can only be learnt.
Register to Reply
Guru
Engineering Fields - Instrumentation Engineering - New Member

Join Date: Dec 2009
Location: San Antonio, TX USA
Posts: 844
Good Answers: 29
#6

Re: UPS Problem

02/17/2011 8:37 AM

Some UPS configurations have several plugs which are surge protection only and several that are zero crossover time UPS supplies. It may be you have inadvertantly connected your PC to one of the SP's instead of a UPS connection. Just theory as there's not much to go on here.

__________________
"Do not worry about your difficulties in Mathematics. I can assure you mine are still greater". - Albert Einstein
Register to Reply Score 1 for Good Answer
Participant

Join Date: Feb 2011
Posts: 1
#8

Re: UPS Problem

02/18/2011 2:06 AM

The UPS that you are using does not switch fast enough to maintain your computer. Purchase a true UPS such as a Liebert or Toshiba and you will have seamless transition. There are other brands out there that will work as well.

Register to Reply
Guru
Hobbies - HAM Radio - New Member United Kingdom - Big Ben - New Member Fans of Old Computers - Altair 8800 - New Member Canada - Member - New Member

Join Date: Jun 2006
Location: Toronto
Posts: 3968
Good Answers: 120
#10

Re: UPS Problem

02/18/2011 5:35 AM

The holdup time of your PC power supply is too low, and the start time of your UPS is too slow, when power fails, it goes to zero and the UPS starts. During this gap the power stored in the switching capacitors should run the power supply for a few cycles.

So the PC maker saved money and gave you aggravation.

Hold up time considerations

There is another type of UPS, a continuously running one, where a charger charges the battery and the UPS runs from it. These have no switchover time, but do have an added continuous load.

Some large operations have large flywheels, with motor/generators coupled to diesels that run 24/7(with no fuel and with valves blocked open). If power fails the system detects and operates the valves, starts the fuel and the flywheel provided the holdup power until the diesel is at full output

__________________
Per Ardua Ad Astra
Register to Reply Score 1 for Good Answer
Anonymous Poster
#11

Re: UPS Problem

02/18/2011 9:32 AM

Yes, I have an Ultra that works this way, runs off the batteries and charges them, when after 4 years one morning the computer would'nt power up I ordered a new set of batteries, cost was 39.00 from amazon source, back in business,

Sincerely
Mitch ret peugeot mechanic

Register to Reply
Anonymous Poster
#12

Re: UPS Problem

02/18/2011 2:13 PM

Spyware spies are in control. This is not a joke.

Register to Reply
Guru

Join Date: Feb 2006
Posts: 1758
Good Answers: 6
#13

Re: UPS Problem

02/19/2011 12:17 AM

1. This is a new developement or from start is.

Generally there are 2 types of small UPS:

a. Online means the UPS is running all the time and on power outage it takes the load till its battery is discharged to the end voltage, or power resumes.

b. Off-Line [ or any name] which is Stad-bye to start as soon as thepower fails or brown-outs. This type has a delay in starting but less than a 1/2 cycle and PC is noy intrupted. The professional models are quick to start but non-professional models may have a little more delay.

can you list your model and some specs [from its nameplate.

Register to Reply
Active Contributor

Join Date: Jan 2011
Posts: 11
#14

Re: UPS Problem

02/19/2011 3:57 AM

Simply your ups is not a ups with zero time load transfer (on-line type), but a standby relay operated power supply (stand-by type). Usually the later works under certain assumptions (electrolytic capacitors of PC large enough to withstand the load for several milliseconds until transfer etc). Two solutions, either change UPS or have a look at the PC caps. Probably they are old enough and 'dry' and need replacement.

Register to Reply
Participant

Join Date: Jan 2011
Location: mumbai
Posts: 3
#15

Re: UPS Problem

02/23/2011 1:00 AM

hello, First check while power cut condition UPS is ON,if not so Battery might have drain out replace the battery. If ON and the Problem is as you wrote then UPS is of low capacity. change the UPS to Higher Capacity. With Regards SHABU

Register to Reply
Register to Reply 15 comments

Good Answers:

These comments received enough positive votes to make them "good answers".

"Almost" Good Answers:

Check out these comments that don't yet have enough votes to be "official" good answers and, if you agree with them, vote them!
Copy to Clipboard

Users who posted comments:

Anonymous Poster (2); aurizon (1); electronorth (1); Haajee (1); kramarat (1); kvsridhar (2); PWSlack (2); RDGRNR (1); rsreedhar1987 (2); SHABU (1); yannissou (1)

Previous in Forum: Projector Flickering   Next in Forum: CPU Problem

Advertisement